Imperial Oatmeal Stout ala Elysian Dragontooth Stout

Greetings! I am not sure how far outside of Seattle Elysian Brewery distributes their beer, but this Stout is really good and I highly recommend it if you can find it. I am trying to formulate a recipe that will get me in the ball park and I am looking for some feedback on what I have put together so far. Even if you have not had it before I'd appreciate any ideas, especially if you see some issues. Thanks in advance!

Beer Description/Ingredients:
http://www.elysianbrewing.com/beer/dragonstooth.html

BeerSmith Recipe Printout - http://www.beersmith.com
Recipe: Dragontooth Stout
Brewer: Stefan
Asst Brewer:
Style: Imperial Stout
TYPE: All Grain
Taste: (35.0)

Recipe Specifications
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Batch Size: 5.50 gal
Boil Size: 6.57 gal
Estimated OG: 1.073 SG
Estimated Color: 33.2 SRM
Estimated IBU: 56.8 IBU
Brewhouse Efficiency: 70.00 %
Boil Time: 60 Minutes

Ingredients:
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Amount Item Type % or IBU
12.00 lb Pale Malt (2 Row) US (2.0 SRM) Grain 73.84 %
1.50 lb Munich Malt - 20L (20.0 SRM) Grain 9.23 %
1.00 lb Oats, Flaked (1.0 SRM) Grain 6.15 %
0.75 lb Chocolate Malt (350.0 SRM) Grain 4.62 %
0.50 lb Caramel/Crystal Malt - 80L (80.0 SRM) Grain 3.08 %
0.50 lb Roasted Barley (300.0 SRM) Grain 3.08 %
1.25 oz Magnum [14.00 %] (60 min) Hops 48.3 IBU
1.00 oz Centennial [10.00 %] (5 min) Hops 5.5 IBU
1.00 oz Cascade [5.50 %] (5 min) Hops 3.0 IBU
1 Pkgs Dry English Ale (White Labs #WLP007) Yeast-Ale


Mash Schedule: Single Infusion, Full Body, Batch Sparge
Total Grain Weight: 16.25 lb
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Single Infusion, Full Body, Batch Sparge
Step Time Name Description Step Temp
60 min Mash In Add 20.31 qt of water at 165.9 F 154.0 F


Notes:
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Bump...

That looks pretty good. I'm thinking of giving that a try but adding a bit of flaked barley and biscuit malt for body.

Did you end up brewing it?

I really like Dragonstooth! How'd yours come out?